I too had an out of the blue panic attack while at work, after feeling for several days that something was either going to happen to someone in my family and me. It was right after Xmas and I had had a wonderful Xmas, then the attack happened and it escalated from there. I was out of the loop for 4 months after that with increasing anxiety, fear, phobia of dying etc. I currently had a relapse after stopping my medication for 2 months, then restarting them incorrectly so now this fear of dying thing is back, although my anxiety/panic has again calmed down glory be to God my depression is back also. But in addition to seeing a therapist, psychiatrist and pcp, I have reached out to a Pastor for guidance because I believe the Lord can bring all of us through this. I will pray for.